Quote:
Originally Posted by Heavy K
Better yet, look at the dorsal fin. That's the easiest distinguishing feature to look at when differentiating Charr species. If it doesn't have any spots, it's a Bull. Even with you're slightly fuzzy picture, the dorsal fin appears to have spots.
HK
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For what it's worth Montana's "Bull Trout Identification Course" says some lake trout don't have dorsal fin spots. According to the course, they have "Light colored or no spots on dorsal fin". and hence why they stress the forked tail.
"TAIL Deeply Forked (Center rays
less than half length of longest
rays)
DORSAL FIN Without spots or
sometimes with light-colored oval
markings
http://fwp.mt.gov/eBook/education/tr...tId/index.html